Liquid biopsy is a minimally invasive diagnostic technique used to detect cancer and other diseases by analyzing biomarkers in blood or other bodily fluids. Unlike traditional tissue biopsies, liquid biopsies can provide real-time insights into the genetic mutations, tumor characteristics, and disease progression without the need for surgical procedures. This technique is particularly valuable for monitoring cancer recurrence, evaluating treatment effectiveness, and identifying personalized treatment options. Liquid biopsies offer a less invasive alternative to tissue sampling, improving patient comfort and potentially leading to earlier detection of diseases.